34714-03-9Relevant articles and documents
FLUORINATED AMINE OXIDE SURFACTANTS
-
Paragraph 0089-0090, (2022/02/27)
Compositions including one or more fluorochemical surfactants of the formula: (I) where Rf is a perfluoroalkyl group, each of R1, R2 and R3 are C1-C20 alkyl, alkoxy, or aryl; and R4 is alkylene, arylene of a combination thereof. R4 is preferably an alkylene of 1-20 carbons that may be cyclic or acyclic, may optionally contain catenated or terminal heteroatoms selected from the group consisting of N, O, and S. Most preferably R4 is an alkylene of 2-10 carbon atoms. Described are anionic N-substituted fluorinated amine oxide surfactants, and use thereof in cleaning and in acid etch solutions. The cleaning and etch solutions are used with a wide variety of substrates, for example, in the cleaning and etching of silicon oxide-containing substrates.
Catalytic systems for the polymerisation and copolymerisation of alpha-olefins
-
, (2008/06/13)
Catalyst component for the polymerization of alpha-olefins in solution, in suspension, in gas phase at low and high pressure and temperature or in mass at high pressures and high or low temperatures, characterised in that is defined by general formulas I or II (L(R)a)xMXywherein: R, equal to or different from each other, is hydrogen or a radical which contains from 1 to 20 carbon atoms; this group optionally contains heteroatoms of groups 14 to 16 of the periodic table of the elements and boron ; at. least one group R contains a group OSiR"3, Q is selected from a group comprising: boron or an element from groups 14 or 16 of the periodic table,; m value can change from 1 to 4 and it preferably is 1 or 2; L, equal to or different from each other, is a cyclic organic group united to M through a ? bond, or it is an atom from groups 15 or 16 of the periodic table; L1and L2, equal to or different from each other, have the same meaning of L; M is a metal from groups 3, 4, 10 of the periodic table, lanthanide or actinide. X ,equal to or different froni each other, is selected froni a group comprising: halogen, hydrogen, OR"', N(R"')2, C1-C20alkyl or C6-C20aryl; wherein R"' is selected from the group comprising: C1-C20alkyl , C3-C20cycloalkyl, C6-C20aryl, C7-C20alkenyl, C7-C20arylalkyl, C7-C20arylalkenyl or alkylaryl, linear or branched; xis 1 or 2, y is 2 or 3 iii such a way that x+ y= 4 dranges from 0 to 2; a, band care integers from 0 to 10, in such a way that a+ b+ c≥ 1
Syntheses of Alkyl Bromides from Ethers and Bromotrimethylsilane
Kricheldorf, Hans R.,Moerber, Georg,Regel, Walter
, p. 383 - 384 (2007/10/02)
-